Making mischief for myself under the heading of "it's not a flaw if it never comes up" : I would imagine that it'd be extremely easy for Korvin to assume that Viscaria would drool at the chance to work on building a cathedral or some such grand project...unless he happened to notice Viscaria's extreme reaction to Theofil's visit and put two and two together. The Church, after all, has the most exciting architecture projects out of anybody around.